摘要
利用邻格方法完成了Z[7]上秩 3的单位格种 gen(Ⅰ3 )及秩 4判别式ε=8+37的正定幺模格种W的分类 ,得到了h(Ⅰ3 ) =3,h(W )
We complete the cassification of unimodular lattices of gen(I\-3) and gen(I\-3⊥<ε>)(ε=8+37) over Z[7]by adjacent lattices method, and obtain h(I\-3)=3,h(I\-3⊥<ε>)=12, and the representative lattices of each class are given.
出处
《河南科学》
2000年第2期133-136,共4页
Henan Science
关键词
正定幺模格
类数
邻格
分类
环
positive definite unimodular lattice
class number
adjacent lattice
